Matt Haughey carefully spliced stills from the two scenes together to create this exquisite composite. It's unsettling, yet intriguing, to see the two stars with their impassive public don't-bother-me faces appearing to stand before one another. The walkway hidden from view, it could be anywhere in abstract LAXspace.

But I prefer an alternate explanation, where the context of the automatic walkway is assumed: Don has turned around in order to travel backwards while chatting up Jackie, but Jackie is having none of his bullshit.